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Nik Wallenda plans tightrope walk near Grand Canyon

Nik Wallenda will not wear a harness on his next stunt near the Grand Canyon this summer. (Photo: AP Graphics Bank)

CAMERON, Ariz. -

Florida aerialist Nik Wallenda has planned his highest tightrope walk yet, and he says he'll do it without a harness.

The 34-year-old announced Monday that he'll walk about one-third of a mile over the Little Colorado River Gorge in late June. The event will take place on the Navajo reservation near Cameron, outside the boundaries of Grand Canyon National Park.